Swift - 获取视频截图（本地视频、网络视频的缩略图）

最编程 2024-03-10 12:11:27
...
 
         import  
         UIKit 
        
         import  
         AVFoundation 
        
         import  
         MobileCoreServices 
        
         class  
         ViewController 
         :  
         UIViewController  
         { 
        
         @IBOutlet  
         weak  
         var  
         imageView:  
         UIImageView 
         ! 
        
         override  
         func  
         viewDidLoad() { 
        
         super 
         .viewDidLoad() 
        
         //异步获取网络视频 
        
         dispatch_async(dispatch_get_global_queue( 
         DISPATCH_QUEUE_PRIORITY_DEFAULT 
         ,0), { 
        
         //获取网络视频 
        
         let  
         url =  
         "http://www.hangge.com/hangge.mp4" 
        
         let  
         videoURL =  
         NSURL 
         (string: url)! 
        
         let  
         avAsset =  
         AVURLAsset 
         ( 
         URL 
         : videoURL) 
        
         //生成视频截图 
        
         let  
         generator =  
         AVAssetImageGenerator 
         (asset: avAsset) 
        
         generator.appliesPreferredTrackTransform =  
         true 
        
         let  
         time =  
         CMTimeMakeWithSeconds 
         (0.0,600) 
        
         var  
         actualTime: 
         CMTime  
         =  
         CMTimeMake 
         (0,0) 
        
         let  
         imageRef: 
         CGImageRef  
         = try! generator.copyCGImageAtTime(time, actualTime: &actualTime) 
        
         let  
         frameImg =  
         UIImage 
         ( 
         CGImage